o.v. a4 twinsafe brochure 09 - process and steam€¦ · reliability pressureunder oliver twinsafe...

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Oliver Twinsafe Valves Ltd’s comprehensive range of piping valves is designed toexceed the demands of today’s international clients. The expertise of our designdepartment together with our modern manufacturing philosophy ensures that we canoffer the utmost flexibility to accommodate a customer’s specific requirements whilstmaintaining short lead times.

F L E X I B I L I T YOliver Twinsafe products are proven in many installations worldwide, often under themost arduous operating conditions. A policy of continuous product development andimprovement helps us to maintain our enviable reputation for reliability.

A process of ‘continuous inspection’ during assembly and test helps to ensure productintegrity.

R E L I A B I L I T Y

CAT OTV REV 9-10

www.valves.co.uk www.valves.co.uk

Oliver Twinsafe Limited Parkgate Industrial EstateKnutsford Cheshire WA16 8FB England

T +44 (0)1565 632636 F +44 (0)1565 654308E [email protected] www.valves.co.uk

A S S E S S M E N T0038 Patented Product

• Full Bore therefore no system pressure

drop problems, no hydrate formation

problems, no flow cavitation problems.

• Using proven trunnion ball

technology in a patented package - world

wide patent no. 1322886 and patent no.

2271164.

• Soft seat and metal seat options for high

temperature service, abrasive /erosive

service or chemical plant applications.

• All forged body construction or all cast

body construction.

• Zero leak points on standard length

twinsafe.

• Maintenance Free

1” to 16” Double block & bleeD PiPeline ValVes solutions to a stanDarD asMe b16.10 length

O.V. A4 Twinsafe Brochure 2010.qx_O.V. A4 Twinsafe Brochure 09.qx 09/04/2010 14:38

Oliver Twinsafe Valves Ltd also have a range of Double Block and Bleed valves designed in accordance with API6A. (Specificationfor wellhead and christmas tree equipment).

API Specification 6A specifies requirements and gives recommendations for the performance, dimensional and functionalinterchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment and purchasing, ofwellhead and christmas tree equipment for use in the petroleum and natural gas industries.

The design constraints imposed by this specification allows us to design and offer a much lighter and lower cost Double Block andBleed valve compared to the design constraints imposed by ASME B16.34.

An excellent example of this is a 2 tonne weight saving between a 11" API 5K (1500kg) Double Block and Bleed valve and a10-25001b ASME B16.34 (3500kg) Double Block and Bleed valve.

Oliver Twinsafe Valves, API6A Double and Block and Bleed valves can be offered in pressure classes of 2K, 3K and 5K and innominal bore sizes up to 11".

Oliver Twinsafe Valves has the inhouse ability to blast and paint valves to our standard three part epoxy paint specifications orcustomers special paint specifications.

Oliver Twinsafe Valves also offers a range of ball- Globe valve and ball - check valves combination.

FiresafeFiresafe in accordance to API 6A, API 607 Rev4, BS6755 Part 2 as Standard.

DesignDesigned in accordance with the industry Standards i.e. B16.34, ASME VIII,B16.10, B16.5, API 6D.

Valve MarkingMarking of ball valves to MSS-SP-25 and EN19 standards.

NACEAs standard, the full range of Oliver Twinsafe Valves are compliant to NACEspecification MR-01-75 (latest revision) ‘Sulphide stress cracking resistantmetallic materials for oilfield equipment’.

Tested as a complete unit in factory in accordance with ASMEB16.34, API 6D Eachvalve product is individually tested both hydrostatically and pneumati-cally as follows: Hydrostatic shell test to 1.5 x full rated pressure, and hydro-static seat test to 1.1 full rated pressure, and a low pressure, pneumatic seattest to 80psig. Gas testing is also available.

Certification and TraceabilityAll valves exhibit unique identification coding and material test certificates toBS EN102043.1.B as well as lifetime factory history being available.

DevelopmentContinual development maintains the highest levels of performance andintegrity for our Double Block and Bleed Twinsafe valves. Oliver TwinsafeValves maintains in-house performance and fire test facilities. We also incor-porate the latest finite element analysis software in the design of valves.

PaintingCarbon steel valves can be supplied with a range of external coatings forenvironmental protection. Please consult factory.

TemperatureStandard temperature range is -20°C to 150°C in accordance with API6D andhigher temperatures to 315°C with metal seated valves, lower temperatureoption to -50°C, -100°C and -196°C full cryogenic are also available.

Explosive DecompressionExplosive decompression occurs when gas at high pressure permeates into sealmaterials. When the gas pressure is reduced the absorbed gas expands, whichcan cause the seals to swell and blister. Oliver Twinsafe Valves only use sealmaterial within their ‘twinsafe valve’ range that are resistant to explosivedecompression.

Pressure Equipment Directive and Atex DirectiveManufactured in accordance with the Pressure Equipment Directive 97/23/EC,(SI 1999/2001) satisfy the essential safety requirements contained there in andCE marked.

Seat Options - Metal Seated - Soft SeatedTungsten Carbide Chrome Carbide and stellite metal seats available as well asfull range of soft seats.

Reduced bores available

Special combination valves are also available(ball globe and check etc.)

Pressure classes available from 150lb to 2500lb

Reduced lead timesOliver Twinsafe valves have a part machine program for valves bodies up to 8”bore size where stocks are kept of standard length products 90% machined withflange detail and vent drain to be machined to customer specification,dramatically reducing lead time.

Maximum sizes and classes8” and below 2500lb, 10” and 12” 1500lb, 14” and 16” 600lb.

technical twinsafe valves in accordance with api 6a

combination valves

painting in house

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Geared Handwheel OperationGenerally valves above 2” 1500 class reduction gearing to turn theball valve through 90 degrees is available, with watertight casingto IP65 protection rating, as strengthened and helicoidal gearing,complete with mechanical position indication. De-clutchablemanual override gear box and high ratio gear boxes for greatertorque output are also available, please consult factory.

Valve Actuation/Limit SwitchesOn one or both of the valves, double acting and spring return,pneumatic or hydraulic actuators are available, limit switches andopen and close indication can also be specified. Please consultfactory.

Fugitive EmissionsTwinsafe Valves have been tested in accordance with Shell fugitiveemission test 77/312.

Seat Injection/Spindle InjectionThis is an option, please specify full details to factory.

Subsea Twinsafe valvesWe supply Twinsafe Double Block and Bleed valves from 1” and 2”bore size for subsea applications.

BI - DirectionalTwinsafe floating and trunnion ball valves are BI - Directional asstandard.

Differential PressureTwinsafe floating and trunnion ball valves can be operated againstfull differential pressure.

Pig Manifold TM RangeBetween a pig valve and a traditional pig launching and receivingstation there is the Oliver Twinsafe valve option of a pig manifold,patent pending. Please consult factory for details.

Weld InlayA Range of weld inlay materials can be applied to valve bodies.

Cavity ReliefAny undesirable build up of pressure in the ball cavity is relievedautomatically past the ‘sprung’ seat design on trunnion mountballs.Emergency shut down valve applicationsPlease consult factory for details.

High Pressure 10K Twinsafe1” and 2” flange size designs to 10,000 psi are available.

Single Isolates in exotic materialAs well as block and bleed configurations and compact cartridgesingle isolate valves.

Compact ConnectionsCombine the enormous weight savings from the Twinsafe conceptwith an additional saving in weight which can be achieved byutilising hub connections or compact flanges.

Anti Static DesignTwinsafe floating and trunnion ball valves incorporate anti staticdesign as standard.

finite element analysis and 3d modeling capability technical

Our ball valves are manufactured according to:

ASTM MATERIALS

NACE MR-01-75 MATERIALS

API 6D MANUFACTURE AND TESTING

ASME B16.34 BALL VALVE DESIGN

ASME B16.5 FLANGED ENDS

ASME B16.10 FACE TO FACE DIMENSIONS (DEPENDANT ON TYPE)

ASME B16.25 BUTT WELD ENDS

ASME B16.11 SOCKET WELD ENDS

ASME VIII BALL VALVE DESIGN

BS 5351 BALL VALVE MANUFACTURE

BS 6755 PART 1 BALL VALVE TESTING

API 6FA, BS 6755 PART 2 FIRESAFE TESTINGAPI 607 REV 4

Oliver Twinsafe Valves have invested heavily in the research and development of new products for the Oil and Gas Industry. To aid this researchand development process, we maintain an in house Finite Element Analysis (FEA) software package.

FEA consists of a computer model of a material or design that is loaded and analysed for specific results. It is used in new product design, andexisting product refinement.

This FEA package is coupled with several 3D modelling software seats, so you can be sure that from the initial concepts of a design through toproduction, the integrity of the valve is guaranteed.

22 3



A S S E S S M E N T

Oliver Twinsafe Valves is a world leading manufacturer ofhigh performance Double Block and Bleed twinsafe unitswith an unrivalled reputation for innovation, productdevelopment, quality and service.

With a rapidly expanding manufacturing facility and acomprehensive network of marketing and distributionoutlets across the globe, the company is able to offeroutstanding support to our customers worldwide.

0038

All Oliver Twinsafe Valves above 1” nominal pipe size are CEmarked in accordance with the (SI 1999/2001) EuropeanPressure Equipment Directive 97/23/EC and satisfy theessential safety requirements contained there in.

Oliver Twinsafe Valves is able to supply a complete rangeof metal-seated valves for abrasive service and hightemperature applications.

Tungsten Carbide for abrasive service applications such asslurry and sand contaminated media.

Chrome Carbide for high temperature applications.

Stellite for high temperature applications. ........All metal-seated Twinsafe valves are tested in accordanceto API 598 for 2” and smaller and API 6D for the largerbore valves.

Oliver Twinsafe Valves is able to combine a metal-seatedball with a soft-seated ball (for positive shut off) into asingle unit.

quality - iso 9001 - 2000

ce marked valves

metal seated balls

The Oliver Group Management operates a high-levelquality control program to ensure all Oliver products aremanufactured to the highest standards using the latesttechnology.

The Oliver Quality Assurance Program encompasses ourentire operation, from order entry to final inspection.

Oliver Twinsafe Valves operate an ISO 9001-2000 qualityassurance system that is fully accredited by Lloyds ofLondon.

4

why every customer should insist on an

oliver twinsafe floating dbb valve

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• A two piece construction, flanged standard length Twinsafe has 2ball valves in an ASME B16.10 standard length from 1”, 1 1/2” and2” bore sizes.

• FSL (flanged standard length) in classes 600, 900, 1500 and2500lb, or FNSL (flange non-standard length) in 150 and 300lb.

• Benefits associated with the Oliver Valves DBB are exactly the samein Twinsafe, however health & safety, weight, cost saving ismaximised a 100% more.

• Space saving, cost saving – the ability to replace onesingle isolate valve for retro-fit work with two or to reduce skidpackage footprint and still maintain full bore double block &bleeding is significant.

• Weight saving, cost saving – the single isolate valve using central spool piece to vent which is called for in many piping specificationsgood rule of thumb is half the weight is saved. This is a significant cost saving on carbon steel bodies, but is multiplied six-fold when exotic bodymaterials are called for.

• Reduced leak paths safety – against a traditional hook-up to two single 3-piece isolated ball valves with traditional trunnion designand spool piece gives a potential of 8 additional leak points! Legislation is moving more to these leak points having to beindividually tested to ensure the soundness of joint.

• Cost saving – less items purchased. In today’s world total cost of project is reviewed by contractors and their users. Comparedto a traditional hook-up, savings on completion times when you review the costs of man hour assembly, gaskets, bolts, pipes, valves and fabrication,plus specialist testing of MPI, radiography and coded welding, plus expediting department to call in all these parts.

• Larger process return on full bore – most products we compete against are reduced bore and also not a uniformly reduced bore,unless you have a ball valve, but bore shape can change or as with the butterfly valve restricts the centre of flow cavity. It also leads to some majorproblems, flow cavitation problems, hydrate formation problems and system pressure drop problems. The actual flow through the valve can also beimmensely important.

• We have range of different material combinations with a range of seat materials from various soft seating materials to metal seated chrome carbideand tungsten carbide seats. Actuation can be pneumatic, electric, on both valves or one valve.

• Forged and cast bodies are available.



small bore (fsl) twinsafe valve solution

world wide patent (flange standard length)

5

All Twinsafe Valves are tested in accordance with our ownin house high perform

ance test specifications, whichoperate above and beyond the tests required in ASMEB16.34, API 598 and API 6D, thus ensuring the custom

erreceives the highest standard of products.

Oliver Twinsafe Valves has invested in the state of the arttest stations to allow larger valves to be tested easily,accurately and quickly.

Gas test facility available. fir

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Oliver Twinsafe valves can provide ‘Firesafe’ valves. We maintain an in house firetest facility, which enables us to provide an independent certified fire test for ourcustomers if required.

The Fire Test Rig consists of 16 Gas burns, which encapsulate the whole valve in atemperature-controlled flame as required by the usual fire test specifications.

Fire tests can be carried out and certified to all the main fire test specifications suchas API 6FA & API 607 Rev 4. Additional fire testsaccording to unique customer specificationscan also be carried out upon request.

All fire-tested valves come complete with a fire testcertificate, which has been certified by an independentbody such as Lloyds or DNV etc.

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Type: LGDBB - Twinsafe level gauge Double Block and Bleed valve.

Used in level Gauge applications where a diaphragm seal pressuretransmitter is being used.

The problem is media in tank can solidify, small particles build upon sensing faces leading to false readings.

Pressure Transmitter is isolated and will need to be removed forcleaning.

A Twinsafe designed specifically for Diaphragm seal pressuretransmitter applications.

Can clean, drain away contaminates and recalibrate transmitterwithout removal.

Consists of 5 valves in 1 compact unit.

OPERATION

1, Close the two main isolation valves.

2, Open needle valve vent, venting cavity between balls to ensurea true double barrier.

3, Open small flushing drain valve (located on the bottom) to drain media trapped between second isolate & diaphragm seal.

4, Add cleaning solution under pressure through the purge valve (located at top) due to internal drillings, the cleaning solution hits the diaphragm seal from four angled ports cleaning the entire face.

5, After flushing with cleaning fluid, reverse above procedure.

Needle valve Bolted bonnet vent(5.4, 11mm bore)

Monoflange vent (5.4, 8mm bore) Twinsafe vent (1”, 2” bore) DBB vent (10, 14, 20mm bore)

Needle valve Threaded bonnet vent(5.4, 11, 20mm bore)

twinsafe level gauge®

valves

vent valve options

6


oliver twinsafe trunnion dbb valve

19

• CSL for the 1- piece body (cartridge standard length) Twinsafe has2- ball valves in an ASME B16.10 standard lengths to 8” full bore.We can continue CSL to 12” with reduced bore and we have a designup to 16” cartridge non - standard length CNSL (cartridge non-standard length).

• Full range of FNSL (flanged non-standard length) 3-piececonstruction incorporating a standard flange or hub connections to16”.

• Full FSL (flanged standard length) or FNSL (flange non-standardlength) 2-piece construction utilising floating ball valves, 2” boresizes.


• Space saving, cost saving – the ability to replace one single isolate valve for retro-fit work with two or to reduce skid package footprint and stillmaintain full bore double block & bleeding is significant.

• Weight saving, cost saving – the single isolate valve using central spool piece to vent which is called for in many piping specifications. A goodrule of thumb is half the weight is saved. This is a significant cost saving on carbon steel bodies, but is multiplied six-fold when exotic body materialsare called for.

• Reduced leak paths safety – against a traditional hook-up to two single 3-piece isolated ball valves with traditional trunnion design and spoolpiece gives a potential of 8 additional leak points! Legislation is moving more to these leak points having to be individually tested toensure the soundness of joint.

• Cost saving – less items purchased. In today’s world total cost of project is reviewed by contractors and their users. Compared to atraditional hook-up, estimate on, say, 6” 1500lb double block & bleed installation a total saving of over £5,000 on each installation isachieved, plus savings on completion times when you review the costs of man hour assembly, gaskets, bolts, pipes, valves and fabrication, plusspecialist testing of MPI, radiography and coded welding, plus expediting department to call in all these parts.

• Larger process return on full bore – most products we compete against are reduced bore and also not a uniformly reduced bore, unless youhave a ball valve, but bore shape can change or as with the butterfly valve restricts the centre of flow cavity. It also leads to some major problemswhere you cannot pig the line due to the valving, flow cavitation problems, hydrate formation problems and system pressure drop problems. However,as many of the 4”, 6” and 8” Twinsafes these are flowline applications, the actual flow through the valve is immensely important. If you take the 6”double block & bleed plug valve with a CV of 1180 against a 6” double block & bleed twinsafe ball valve with a CV of 5074 these figures actuallyequate to 44,532 barrels per day from the plug valves and 191,489 barrels per day through our Twinsafe valves. At $90 a barrel this is$13,226,940 a day more through our valve than the plug valve! Therefore maximise through paths equals maximum profit.


• We also have many different services. We have great successes in cryogenic, low temperature, LNG, polymer, high temperature, semi-solid and severeservice.

• Major benefit to Oliver Twinsafe Valves is our sister company, Oliver Valves, who can supply an exhaustive range of vent valve configurations invarious needle valves from 5.4mm to 20mm bore, bolted bonnet, double block & bleed, monoflange and Twinsafe vent valves up to 2” bore –literally anything is possible.

• Cast & forged bodies available and inlaying either 100% or seat cavities are available.



large bore (csl) twinsafe valve solution

world wide patent (cartridge standard length)

www.valves.co.uk

7

Standard: 1500C continuous

Option: 1800C continuous

Option: 3150C continuous

Twinsafe valves as standard have anupper tem

perature range of 150 oC, thiscan be extended to 180 oC (HT180) onstandard design with addition of highertem

perature seals. We also have option ofexpanding upper lim

it to 315 oC (HT315).

Twinsafe Valves have supplied valves intodirty and severe service and sem

i solidservice using a com

bination of: Tungstencarbide m

etal seats (MS-TC), as well asour spring protection system

(SPC), ballcavity filler (CF) and hybrid trunnion ballvalve design (HTB).

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Twinsafe valves as standard have a lowertem

perature range of -20 oC continuousworking tem

perature which is also suitablefor - 46 oC (-50 oF) blowdown service (ie fora lim

ited time).

A full range of low temperature extended

bonnets are available from -50 oC (LT50),

-100 oC (LT100) and full cryogenic valvesfor LNG service down to -196 oC (LT196).

Standard: -200C continuous

-460C blowdown

Option: -500C continuous



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Minimising Leak Paths = Maximum Safety.

Maximising Through Paths = Maximum Profits.

Full Bore therefore;

. No system pressure drop problems

. No Hydrate formation problems

. No flow cavitation problems

. No pig restriction problems

A major priority is to MINIMISE PRESSURE DROPS, which will occur in flow lines. By minimising thepressure drops you can maximise the product, which in turn increases PROFIT.

The easiest way to maximise the reductions in diameter of the flow line is to introduce a full bore valve, which willhave the largest flow coefficient (Cv) for a given nominal bore.

Flow coefficient, or, Cv by definition is the volume of water in gallons per minute at 60oF that will flow through agiven element with a pressure drop of 1 psi. Below are some examples of calculations on different pipeline valves.

To calculate the flow that could be achieved from each of these valves with a 1 psi pressure drop, we would use theformula below.

Taking the difference between these two figures of 146,966 barrels per day and multiplying this by cost of a barrelof crude oil $90 it can be seen that an extra $13,226,940 a day can be produced which is why it makes sense to installan Oliver Twinsafe Full Bore Double Block and Bleed valve.

Q = Flow, gallons per minuteCv = Flow coefficient

AP = Pressure Drop, psis.g.= Specific gravity

Q = Cv AP

(s.g.)V

The process media will be taken as API 40o Crude with specific gravity of 0.825.

Oliver Twinsafe Valve 6” Double Blockand Bleed Full Bore Ball Valve

Valve Cv = 5074

Typical Single Block 6” Plug Valve

Valve Cv = 1180


Flow = 5586 Gallons/Minute

This actually equates to 191,489 barrelsper day




full bore : larger process return

ON FLOWLINES ADDITIONAL $10,000,000 OF PROCESS THROUGH VALVE A DAY.

Production

Test Cells

Shop Floor Engineering Office

Gas Test Cells

Production

oliver twinsafe facility

8 17



1” & 2” ForgedBody Twinsafe

Twinsafe ‘Space Saving’

. World Wide Patent No. 2271164.

. Size 1” through 2” (FSL) NB.

. To ASME B16.10 Length (FSL) in classes 600, 900, 1500 & 2500lb.

Non Standard Length (FNSL) in 150 & 300lb.

. Floating Ball construction.

. Needle valve vent.

. Lever operated.

. Available Forged or Cast body.

2” Cast Body Twinsafe

flanged style, two piece construction (fsl) (fnsl)less items purchased : cost saving

A Single Isolate 6” Full Bore 1500 LB Ball Valve to ASME B16.10 Length VersusAn Oliver Twinsafe 6” Full Bore 1500 LB Double Block and Bleed Valve to ASME B16.10 Length.

6” 300/600lb ExampleExisting Hook Up - Two Isolation valves, plus Vent Valve and Associated Materials, Fabrication. Installation and TestingMaterialsPipe (A333 Gr 6) Sch XXS 6” 6 £67.24 £403.44Flange RFWN-600# Sch XXS 6” 2 £143.75 £287.50Flange RFWN-600# Sch XXS 3/4” 1 £13.13 £13.13O’ Lets Sch 160 3/4” 1 £22.50 £22.50Spiral Wound Gasket - 600# 6” 4 £11.83 £47.32Spiral Wound Gasket - 600# 3/4” 1 £2.04 £2.04Bolts per set 6” - 600# 4 £99.60 £398.40Bolts per set 1” - 600# 1 £11.30 £11.30Fabricators Handling Charge @ 10% £118.56Valves 300/600# 6” 2 £3,300.00 £6,600.00Valves 300/600# 3/4” 1 £400.00 £400.00 £8,304.19

FabricationButt Weld Sch XXS 6” 2 £294.32 £588.64Butt Weld Sch XXS 3/4” 1 £61.23 £61.23O’let 3/4” 1 £61.23 £61.23Radiography 6” 2 £30.63 £61.26Radiography 3/4” 1 £19.03 £19.03MPI 6” 2 £3.19 £6.38MPI 3/4” 2 £1.65 £3.30Hydrotest 1 £100.00 £100.00Paint 1 £100.00 £100.00 £1,001.07

InstallationErect Valve 600# 6” 2 11.08 22.16Erect Valve 600# 3/4” 1 3.57 3.57Erect Valves Pipework Sch XXS 6” 1 6.51 6.51Bolt up Flg’d Joint 600# 6” 2 5.33 10.66Bolt up Flg’d Joint 600# 3/4” 1 1.87 1.87

Non Prod and Sup’v @ 70% 31.34Total Man Hours 76.11Man Hour Rate £33.00 £2,511.63

TOTAL COST £11,816.89

Proposed Oliver Twinsafe ValveMaterials Valve 600# Twinsafe DBB 6” 1 £5,012.00Spiral Wound Gasket - 600# 6” 2 £11.83 £23.66Bolts per set 6” - 600# 2 £99.60 £199.20 £5,234.86

FabricationNot Applicable £0

InstallationErect Valve 600# 6” 1 20.00 20.00Bolt up flag’d Joint 600# 6” 2 5.33 10.66

Non Prod and Sup’v @ 70% 21.46

Total Man Hours 52.12Man Hour Rate £33.00 £1,719.96


Total saving £4,862.07 each installation, plus saving on completion time. Leak points onjoints, weight of each unit, space of each unit, safety of pressure testing of the whole unitat the factory, one item to tag as opposed to many, no specialist coded welding orMPI/Radiography inspection personnel on site.

6” 1500lb ExampleExisting Hook Up - Two Isolation valves, plus Vent Valve and Associated Materials, Fabrication. Installation and TestingMaterialsPipe (A333 Gr 6) Sch XXS 6” 6 £67.24 £403.44Flange RFWN-1500# Sch XXS 6” 2 £143.75 £287.50Flange RFWN-1500# Sch XXS 3/4” 1 £13.13 £13.13O’ Lets Sch 160 3/4” 1 £22.50 £22.50Spiral Wound Gasket - 1500# 6” 4 £11.83 £47.32Spiral Wound Gasket - 1500# 3/4” 1 £2.04 £2.04Bolts per set 6” - 1500# 4 £99.60 £398.40Bolts per set 1” - 1500# 1 £11.30 £11.30Fabricators Handling Charge @ 10% £118.56Valves 1500# 6” 2 £5,000.00 £10,000.00Valves 1500# 3/4” 1 £500.00 £500.00 £11,804.19





Proposed Oliver Twinsafe ValveMaterialsValve 1500# Twinsafe DBB 6” 1 £8,200.00Spiral Wound Gasket - 1500# 6” 2 £11.83 £23.66Bolts per set 6” - 1500# 2 £99.60 £199.20 £8,422.86







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THEFUTURE

THEPAST

HUGE HIDDEN COST SAVINGS OF ONE FACTORY TESTED UNIT vs TRADITIONAL INSTALLATION.

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reduced leak paths : safety

Looking at a traditional hook up, two traditional single 3 piece isolate ball valves and spool piece means a potential of,

8 additional leak points (2 from trunnion, 4 from 3 piece design, 2 from spool joints.) Compared to one piece Twinsafe with

slipper plate trunnion design.

TWINSAFE vs TWO ISOLATION BALL VALVE HOOK UP = A REDUCTION OF EIGHT POTENTIAL LEAK PATHS.

8” Full bore 1500 LBStandard ASME B16.10 Length Twinsafe valve

3” Full Bore 900 LBStandard ASME B16.10 Length Twinsafe valve

. World Wide Patent No. 1322886, one piece design.

. Available in ASME B16.10 Standard Length (CSL) up to 8” Full Bore.

. Available in ASME B16.10 Standard Length (CSL) up to 12” Reduced Bore.

. Available in Non Standard Length (CNSL) to Customer Specifications.

. Studded flanged detail to ASME B16.5.

. Needle valve vent or Double Block and Bleed vent option available.

. Trunnion construction patent application number PCT/GB2004/000856.


cartridge style, single piece construction (csl) (cnsl)

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3” Full Bore 1500 LBNon Standard Length Twinsafe valve

. Non Standard Length (FNSL) face to face dimensions.

. Flanged connections to ASME B16.5.


. Trunnion & Floating Ball Construction.


12” Full bore 600 LBNon Standard Length Twinsafe valve

flanged style, three piece construction (fnsl)weight saving : cost saving

Almost half the weight is taken out of a double block and bleed hookup when compared to two single isolates (more if spool

piece is included) multiply this by multiple assemblies of Twinsafe on the top works of an offshore platform as shown, the

weight savings and cost savings are dramatic, more so if valves are in exotic material.

STANDARD ISOLATION VALVE6” X 4” REDUCED BORE

OLIVER TWINSAFE VALVE6” X 4” REDUCED BORE

= 217kg X 2 = 434kg = 284kg

TWINSAFE vs TWO STANDARD ISOLATION BALL VALVE HOOK UP = A REDUCTION OF ALMOST HALF OF THE WEIGHT.

14 11



space saving : cost saving

Standard ASME B16.10 Length full bore

Twinsafe valves replace single Isolate valves

in retrofit work and provides engineers the

opportunity to move from single isolate to

Double Block and Bleed without design

change of pipework.

Skid package footprint reduced therefore skid cost reduced by keeping the valve envelope to standard ASME B16.10 length.

REPLACE ONE VALVE WITH TWO, WITH NO MODIFICATION TO PIPEWORK.

sample oliver twinsafe®

valve proJect reference list

12 13



space saving : cost saving

Standard ASME B16.10 Length full bore

Twinsafe valves replace single Isolate valves

in retrofit work and provides engineers the

opportunity to move from single isolate to

Double Block and Bleed without design

change of pipework.

Skid package footprint reduced therefore skid cost reduced by keeping the valve envelope to standard ASME B16.10 length.

REPLACE ONE VALVE WITH TWO, WITH NO MODIFICATION TO PIPEWORK.

sample oliver twinsafe®

valve proJect reference list

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O.V. A4 Twinsafe Brochure 2010.qx_O.V. A4 Twinsafe Brochure 09.qx 08/04/2010 22:23 Page 12

3” Full Bore 1500 LBNon Standard Length Twinsafe valve

. Non Standard Length (FNSL) face to face dimensions.

. Flanged connections to ASME B16.5.


. Trunnion & Floating Ball Construction.


12” Full bore 600 LBNon Standard Length Twinsafe valve

flanged style, three piece construction (fnsl)weight saving : cost saving

Almost half the weight is taken out of a double block and bleed hookup when compared to two single isolates (more if spool

piece is included) multiply this by multiple assemblies of Twinsafe on the top works of an offshore platform as shown, the

weight savings and cost savings are dramatic, more so if valves are in exotic material.

STANDARD ISOLATION VALVE6” X 4” REDUCED BORE

OLIVER TWINSAFE VALVE6” X 4” REDUCED BORE

= 217kg X 2 = 434kg = 284kg

TWINSAFE vs TWO STANDARD ISOLATION BALL VALVE HOOK UP = A REDUCTION OF ALMOST HALF OF THE WEIGHT.

14 11



reduced leak paths : safety

Looking at a traditional hook up, two traditional single 3 piece isolate ball valves and spool piece means a potential of,

8 additional leak points (2 from trunnion, 4 from 3 piece design, 2 from spool joints.) Compared to one piece Twinsafe with

slipper plate trunnion design.

TWINSAFE vs TWO ISOLATION BALL VALVE HOOK UP = A REDUCTION OF EIGHT POTENTIAL LEAK PATHS.

8” Full bore 1500 LBStandard ASME B16.10 Length Twinsafe valve

3” Full Bore 900 LBStandard ASME B16.10 Length Twinsafe valve

. World Wide Patent No. 1322886, one piece design.

. Available in ASME B16.10 Standard Length (CSL) up to 8” Full Bore.

. Available in ASME B16.10 Standard Length (CSL) up to 12” Reduced Bore.

. Available in Non Standard Length (CNSL) to Customer Specifications.

. Studded flanged detail to ASME B16.5.


. Trunnion construction patent application number PCT/GB2004/000856.


cartridge style, single piece construction (csl) (cnsl)

10 15



1” & 2” ForgedBody Twinsafe

Twinsafe ‘Space Saving’

. World Wide Patent No. 2271164.

. Size 1” through 2” (FSL) NB.

. To ASME B16.10 Length (FSL) in classes 600, 900, 1500 & 2500lb.

Non Standard Length (FNSL) in 150 & 300lb.

. Floating Ball construction.

. Needle valve vent.

. Lever operated.


2” Cast Body Twinsafe

flanged style, two piece construction (fsl) (fnsl)less items purchased : cost saving

A Single Isolate 6” Full Bore 1500 LB Ball Valve to ASME B16.10 Length VersusAn Oliver Twinsafe 6” Full Bore 1500 LB Double Block and Bleed Valve to ASME B16.10 Length.

6” 300/600lb ExampleExisting Hook Up - Two Isolation valves, plus Vent Valve and Associated Materials, Fabrication. Installation and TestingMaterialsPipe (A333 Gr 6) Sch XXS 6” 6 £67.24 £403.44Flange RFWN-600# Sch XXS 6” 2 £143.75 £287.50Flange RFWN-600# Sch XXS 3/4” 1 £13.13 £13.13O’ Lets Sch 160 3/4” 1 £22.50 £22.50Spiral Wound Gasket - 600# 6” 4 £11.83 £47.32Spiral Wound Gasket - 600# 3/4” 1 £2.04 £2.04Bolts per set 6” - 600# 4 £99.60 £398.40Bolts per set 1” - 600# 1 £11.30 £11.30Fabricators Handling Charge @ 10% £118.56Valves 300/600# 6” 2 £3,300.00 £6,600.00Valves 300/600# 3/4” 1 £400.00 £400.00 £8,304.19





Proposed Oliver Twinsafe ValveMaterials Valve 600# Twinsafe DBB 6” 1 £5,012.00Spiral Wound Gasket - 600# 6” 2 £11.83 £23.66Bolts per set 6” - 600# 2 £99.60 £199.20 £5,234.86







6” 1500lb ExampleExisting Hook Up - Two Isolation valves, plus Vent Valve and Associated Materials, Fabrication. Installation and TestingMaterialsPipe (A333 Gr 6) Sch XXS 6” 6 £67.24 £403.44Flange RFWN-1500# Sch XXS 6” 2 £143.75 £287.50Flange RFWN-1500# Sch XXS 3/4” 1 £13.13 £13.13O’ Lets Sch 160 3/4” 1 £22.50 £22.50Spiral Wound Gasket - 1500# 6” 4 £11.83 £47.32Spiral Wound Gasket - 1500# 3/4” 1 £2.04 £2.04Bolts per set 6” - 1500# 4 £99.60 £398.40Bolts per set 1” - 1500# 1 £11.30 £11.30Fabricators Handling Charge @ 10% £118.56Valves 1500# 6” 2 £5,000.00 £10,000.00Valves 1500# 3/4” 1 £500.00 £500.00 £11,804.19





Proposed Oliver Twinsafe ValveMaterialsValve 1500# Twinsafe DBB 6” 1 £8,200.00Spiral Wound Gasket - 1500# 6” 2 £11.83 £23.66Bolts per set 6” - 1500# 2 £99.60 £199.20 £8,422.86







x

x x

x

THEFUTURE

THEPAST

HUGE HIDDEN COST SAVINGS OF ONE FACTORY TESTED UNIT vs TRADITIONAL INSTALLATION.

16 9



Minimising Leak Paths = Maximum Safety.

Maximising Through Paths = Maximum Profits.

Full Bore therefore;

. No system pressure drop problems

. No Hydrate formation problems

. No flow cavitation problems

. No pig restriction problems

A major priority is to MINIMISE PRESSURE DROPS, which will occur in flow lines. By minimising thepressure drops you can maximise the product, which in turn increases PROFIT.

The easiest way to maximise the reductions in diameter of the flow line is to introduce a full bore valve, which willhave the largest flow coefficient (Cv) for a given nominal bore.

Flow coefficient, or, Cv by definition is the volume of water in gallons per minute at 60oF that will flow through agiven element with a pressure drop of 1 psi. Below are some examples of calculations on different pipeline valves.

To calculate the flow that could be achieved from each of these valves with a 1 psi pressure drop, we would use theformula below.

Taking the difference between these two figures of 146,966 barrels per day and multiplying this by cost of a barrelof crude oil $90 it can be seen that an extra $13,226,940 a day can be produced which is why it makes sense to installan Oliver Twinsafe Full Bore Double Block and Bleed valve.

Q = Flow, gallons per minuteCv = Flow coefficient

AP = Pressure Drop, psis.g.= Specific gravity

Q = Cv AP

(s.g.)V

The process media will be taken as API 40o Crude with specific gravity of 0.825.


Valve Cv = 5074


Valve Cv = 1180







full bore : larger process return

ON FLOWLINES ADDITIONAL $10,000,000 OF PROCESS THROUGH VALVE A DAY.

Production

Test Cells

Shop Floor Engineering Office

Gas Test Cells

Production

oliver twinsafe facility

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Standard: 1500C continuousOption: 1800C continuousOption: 3150C continuous

Twinsafe valves as standard have anupper temperature range of 150oC, thiscan be extended to 180oC (HT180) onstandard design with addition of highertemperature seals. We also have option ofexpanding upper limit to 315oC (HT315).

Twinsafe Valves have supplied valves intodirty and severe service and semi solidservice using a combination of: Tungstencarbide metal seats (MS-TC), as well asour spring protection system (SPC), ballcavity filler (CF) and hybrid trunnion ballvalve design (HTB).

firesafe testing

high temperature service - semi solid service - severe service

Twinsafe valves as standard have a lowertemperature range of -20oC continuousworking temperature which is also suitablefor - 46oC (-50oF) blowdown service (ie fora limited time).

A full range of low temperature extendedbonnets are available from -50oC (LT50),-100oC (LT100) and full cryogenic valvesfor LNG service down to -196oC (LT196).

Standard: -200C continuous-460C blowdown

Option: -500C continuousOption: -1000C continuousOption: -1960C continuous

18

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Type: LGDBB - Twinsafe level gauge Double Block and Bleed valve.

Used in level Gauge applications where a diaphragm seal pressuretransmitter is being used.

The problem is media in tank can solidify, small particles build upon sensing faces leading to false readings.

Pressure Transmitter is isolated and will need to be removed forcleaning.

A Twinsafe designed specifically for Diaphragm seal pressuretransmitter applications.

Can clean, drain away contaminates and recalibrate transmitterwithout removal.

Consists of 5 valves in 1 compact unit.

OPERATION

1, Close the two main isolation valves.

2, Open needle valve vent, venting cavity between balls to ensurea true double barrier.

3, Open small flushing drain valve (located on the bottom) to drain media trapped between second isolate & diaphragm seal.

4, Add cleaning solution under pressure through the purge valve (located at top) due to internal drillings, the cleaning solution hits the diaphragm seal from four angled ports cleaning the entire face.

5, After flushing with cleaning fluid, reverse above procedure.

Needle valve Bolted bonnet vent(5.4, 11mm bore)

Monoflange vent (5.4, 8mm bore) Twinsafe vent (1”, 2” bore) DBB vent (10, 14, 20mm bore)

Needle valve Threaded bonnet vent(5.4, 11, 20mm bore)

twinsafe level gauge®

valves

vent valve options

6


oliver twinsafe trunnion dbb valve

19

• CSL for the 1- piece body (cartridge standard length) Twinsafe has2- ball valves in an ASME B16.10 standard lengths to 8” full bore.We can continue CSL to 12” with reduced bore and we have a designup to 16” cartridge non - standard length CNSL (cartridge non-standard length).

• Full range of FNSL (flanged non-standard length) 3-piececonstruction incorporating a standard flange or hub connections to16”.

• Full FSL (flanged standard length) or FNSL (flange non-standardlength) 2-piece construction utilising floating ball valves, 2” boresizes.


• Space saving, cost saving – the ability to replace one single isolate valve for retro-fit work with two or to reduce skid package footprint and stillmaintain full bore double block & bleeding is significant.

• Weight saving, cost saving – the single isolate valve using central spool piece to vent which is called for in many piping specifications. A goodrule of thumb is half the weight is saved. This is a significant cost saving on carbon steel bodies, but is multiplied six-fold when exotic body materialsare called for.

• Reduced leak paths safety – against a traditional hook-up to two single 3-piece isolated ball valves with traditional trunnion design and spoolpiece gives a potential of 8 additional leak points! Legislation is moving more to these leak points having to be individually tested toensure the soundness of joint.

• Cost saving – less items purchased. In today’s world total cost of project is reviewed by contractors and their users. Compared to atraditional hook-up, estimate on, say, 6” 1500lb double block & bleed installation a total saving of over £5,000 on each installation isachieved, plus savings on completion times when you review the costs of man hour assembly, gaskets, bolts, pipes, valves and fabrication, plusspecialist testing of MPI, radiography and coded welding, plus expediting department to call in all these parts.

• Larger process return on full bore – most products we compete against are reduced bore and also not a uniformly reduced bore, unless youhave a ball valve, but bore shape can change or as with the butterfly valve restricts the centre of flow cavity. It also leads to some major problemswhere you cannot pig the line due to the valving, flow cavitation problems, hydrate formation problems and system pressure drop problems. However,as many of the 4”, 6” and 8” Twinsafes these are flowline applications, the actual flow through the valve is immensely important. If you take the 6”double block & bleed plug valve with a CV of 1180 against a 6” double block & bleed twinsafe ball valve with a CV of 5074 these figures actuallyequate to 44,532 barrels per day from the plug valves and 191,489 barrels per day through our Twinsafe valves. At $90 a barrel this is$13,226,940 a day more through our valve than the plug valve! Therefore maximise through paths equals maximum profit.


• We also have many different services. We have great successes in cryogenic, low temperature, LNG, polymer, high temperature, semi-solid and severeservice.

• Major benefit to Oliver Twinsafe Valves is our sister company, Oliver Valves, who can supply an exhaustive range of vent valve configurations invarious needle valves from 5.4mm to 20mm bore, bolted bonnet, double block & bleed, monoflange and Twinsafe vent valves up to 2” bore –literally anything is possible.

• Cast & forged bodies available and inlaying either 100% or seat cavities are available.



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All Twinsafe Valves are tested in accordance with our ownin house high performance test specifications, whichoperate above and beyond the tests required in ASMEB16.34, API 598 and API 6D, thus ensuring the customerreceives the highest standard of products.

Oliver Twinsafe Valves has invested in the state of the arttest stations to allow larger valves to be tested easily,accurately and quickly.

Gas test facility available.

firesafe testing

Oliver Twinsafe valves can provide ‘Firesafe’ valves. We maintain an in house firetest facility, which enables us to provide an independent certified fire test for ourcustomers if required.

The Fire Test Rig consists of 16 Gas burns, which encapsulate the whole valve in atemperature-controlled flame as required by the usual fire test specifications.

Fire tests can be carried out and certified to all the main fire test specifications suchas API 6FA & API 607 Rev 4. Additional fire testsaccording to unique customer specificationscan also be carried out upon request.

All fire-tested valves come complete with a fire testcertificate, which has been certified by an independentbody such as Lloyds or DNV etc.

pressure testing - gas testing

20

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A S S E S S M E N T

Oliver Twinsafe Valves is a world leading manufacturer ofhigh performance Double Block and Bleed twinsafe unitswith an unrivalled reputation for innovation, productdevelopment, quality and service.

With a rapidly expanding manufacturing facility and acomprehensive network of marketing and distributionoutlets across the globe, the company is able to offeroutstanding support to our customers worldwide.

0038

All Oliver Twinsafe Valves above 1” nominal pipe size are CEmarked in accordance with the (SI 1999/2001) EuropeanPressure Equipment Directive 97/23/EC and satisfy theessential safety requirements contained there in.

Oliver Twinsafe Valves is able to supply a complete rangeof metal-seated valves for abrasive service and hightemperature applications.

Tungsten Carbide for abrasive service applications such asslurry and sand contaminated media.

Chrome Carbide for high temperature applications.

Stellite for high temperature applications. ........All metal-seated Twinsafe valves are tested in accordanceto API 598 for 2” and smaller and API 6D for the largerbore valves.

Oliver Twinsafe Valves is able to combine a metal-seatedball with a soft-seated ball (for positive shut off) into asingle unit.

quality - iso 9001 - 2000

ce marked valves

metal seated balls

The Oliver Group Management operates a high-levelquality control program to ensure all Oliver products aremanufactured to the highest standards using the latesttechnology.

The Oliver Quality Assurance Program encompasses ourentire operation, from order entry to final inspection.

Oliver Twinsafe Valves operate an ISO 9001-2000 qualityassurance system that is fully accredited by Lloyds ofLondon.

4


oliver twinsafe floating dbb valve

21

• A two piece construction, flanged standard length Twinsafe has 2ball valves in an ASME B16.10 standard length from 1”, 1 1/2” and2” bore sizes.

• FSL (flanged standard length) in classes 600, 900, 1500 and2500lb, or FNSL (flange non-standard length) in 150 and 300lb.


• Space saving, cost saving – the ability to replace onesingle isolate valve for retro-fit work with two or to reduce skidpackage footprint and still maintain full bore double block &bleeding is significant.

• Weight saving, cost saving – the single isolate valve using central spool piece to vent which is called for in many piping specificationsgood rule of thumb is half the weight is saved. This is a significant cost saving on carbon steel bodies, but is multiplied six-fold when exotic bodymaterials are called for.

• Reduced leak paths safety – against a traditional hook-up to two single 3-piece isolated ball valves with traditional trunnion designand spool piece gives a potential of 8 additional leak points! Legislation is moving more to these leak points having to beindividually tested to ensure the soundness of joint.

• Cost saving – less items purchased. In today’s world total cost of project is reviewed by contractors and their users. Comparedto a traditional hook-up, savings on completion times when you review the costs of man hour assembly, gaskets, bolts, pipes, valves and fabrication,plus specialist testing of MPI, radiography and coded welding, plus expediting department to call in all these parts.

• Larger process return on full bore – most products we compete against are reduced bore and also not a uniformly reduced bore,unless you have a ball valve, but bore shape can change or as with the butterfly valve restricts the centre of flow cavity. It also leads to some majorproblems, flow cavitation problems, hydrate formation problems and system pressure drop problems. The actual flow through the valve can also beimmensely important.


• Forged and cast bodies are available.



Geared Handwheel OperationGenerally valves above 2” 1500 class reduction gearing to turn theball valve through 90 degrees is available, with watertight casingto IP65 protection rating, as strengthened and helicoidal gearing,complete with mechanical position indication. De-clutchablemanual override gear box and high ratio gear boxes for greatertorque output are also available, please consult factory.

Valve Actuation/Limit SwitchesOn one or both of the valves, double acting and spring return,pneumatic or hydraulic actuators are available, limit switches andopen and close indication can also be specified. Please consultfactory.

Fugitive EmissionsTwinsafe Valves have been tested in accordance with Shell fugitiveemission test 77/312.

Seat Injection/Spindle InjectionThis is an option, please specify full details to factory.

Subsea Twinsafe valvesWe supply Twinsafe Double Block and Bleed valves from 1” and 2”bore size for subsea applications.

BI - DirectionalTwinsafe floating and trunnion ball valves are BI - Directional asstandard.

Differential PressureTwinsafe floating and trunnion ball valves can be operated againstfull differential pressure.

Pig Manifold TM RangeBetween a pig valve and a traditional pig launching and receivingstation there is the Oliver Twinsafe valve option of a pig manifold,patent pending. Please consult factory for details.

Weld InlayA Range of weld inlay materials can be applied to valve bodies.

Cavity ReliefAny undesirable build up of pressure in the ball cavity is relievedautomatically past the ‘sprung’ seat design on trunnion mountballs.Emergency shut down valve applicationsPlease consult factory for details.

High Pressure 10K Twinsafe1” and 2” flange size designs to 10,000 psi are available.

Single Isolates in exotic materialAs well as block and bleed configurations and compact cartridgesingle isolate valves.

Compact ConnectionsCombine the enormous weight savings from the Twinsafe conceptwith an additional saving in weight which can be achieved byutilising hub connections or compact flanges.

Anti Static DesignTwinsafe floating and trunnion ball valves incorporate anti staticdesign as standard.

finite element analysis and 3d modeling capability technical

Our ball valves are manufactured according to:

ASTM MATERIALS

NACE MR-01-75 MATERIALS

API 6D MANUFACTURE AND TESTING

ASME B16.34 BALL VALVE DESIGN

ASME B16.5 FLANGED ENDS

ASME B16.10 FACE TO FACE DIMENSIONS (DEPENDANT ON TYPE)

ASME B16.25 BUTT WELD ENDS

ASME B16.11 SOCKET WELD ENDS

ASME VIII BALL VALVE DESIGN

BS 5351 BALL VALVE MANUFACTURE

BS 6755 PART 1 BALL VALVE TESTING

API 6FA, BS 6755 PART 2 FIRESAFE TESTINGAPI 607 REV 4

Oliver Twinsafe Valves have invested heavily in the research and development of new products for the Oil and Gas Industry. To aid this researchand development process, we maintain an in house Finite Element Analysis (FEA) software package.

FEA consists of a computer model of a material or design that is loaded and analysed for specific results. It is used in new product design, andexisting product refinement.

This FEA package is coupled with several 3D modelling software seats, so you can be sure that from the initial concepts of a design through toproduction, the integrity of the valve is guaranteed.

22 3



Oliver Twinsafe Valves Ltd also have a range of Double Block and Bleed valves designed in accordance with API6A. (Specificationfor wellhead and christmas tree equipment).

API Specification 6A specifies requirements and gives recommendations for the performance, dimensional and functionalinterchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment and purchasing, ofwellhead and christmas tree equipment for use in the petroleum and natural gas industries.

The design constraints imposed by this specification allows us to design and offer a much lighter and lower cost Double Block andBleed valve compared to the design constraints imposed by ASME B16.34.

An excellent example of this is a 2 tonne weight saving between a 11" API 5K (1500kg) Double Block and Bleed valve and a10-25001b ASME B16.34 (3500kg) Double Block and Bleed valve.

Oliver Twinsafe Valves, API6A Double and Block and Bleed valves can be offered in pressure classes of 2K, 3K and 5K and innominal bore sizes up to 11".

Oliver Twinsafe Valves has the inhouse ability to blast and paint valves to our standard three part epoxy paint specifications orcustomers special paint specifications.

Oliver Twinsafe Valves also offers a range of ball- Globe valve and ball - check valves combination.

FiresafeFiresafe in accordance to API 6A, API 607 Rev4, BS6755 Part 2 as Standard.

DesignDesigned in accordance with the industry Standards i.e. B16.34, ASME VIII,B16.10, B16.5, API 6D.

Valve MarkingMarking of ball valves to MSS-SP-25 and EN19 standards.

NACEAs standard, the full range of Oliver Twinsafe Valves are compliant to NACEspecification MR-01-75 (latest revision) ‘Sulphide stress cracking resistantmetallic materials for oilfield equipment’.

Tested as a complete unit in factory in accordance with ASMEB16.34, API 6D Eachvalve product is individually tested both hydrostatically and pneumati-cally as follows: Hydrostatic shell test to 1.5 x full rated pressure, and hydro-static seat test to 1.1 full rated pressure, and a low pressure, pneumatic seattest to 80psig. Gas testing is also available.

Certification and TraceabilityAll valves exhibit unique identification coding and material test certificates toBS EN102043.1.B as well as lifetime factory history being available.

DevelopmentContinual development maintains the highest levels of performance andintegrity for our Double Block and Bleed Twinsafe valves. Oliver TwinsafeValves maintains in-house performance and fire test facilities. We also incor-porate the latest finite element analysis software in the design of valves.

PaintingCarbon steel valves can be supplied with a range of external coatings forenvironmental protection. Please consult factory.

TemperatureStandard temperature range is -20°C to 150°C in accordance with API6D andhigher temperatures to 315°C with metal seated valves, lower temperatureoption to -50°C, -100°C and -196°C full cryogenic are also available.

Explosive DecompressionExplosive decompression occurs when gas at high pressure permeates into sealmaterials. When the gas pressure is reduced the absorbed gas expands, whichcan cause the seals to swell and blister. Oliver Twinsafe Valves only use sealmaterial within their ‘twinsafe valve’ range that are resistant to explosivedecompression.

Pressure Equipment Directive and Atex DirectiveManufactured in accordance with the Pressure Equipment Directive 97/23/EC,(SI 1999/2001) satisfy the essential safety requirements contained there in andCE marked.

Seat Options - Metal Seated - Soft SeatedTungsten Carbide Chrome Carbide and stellite metal seats available as well asfull range of soft seats.

Reduced bores available

Special combination valves are also available(ball globe and check etc.)

Pressure classes available from 150lb to 2500lb

Reduced lead timesOliver Twinsafe valves have a part machine program for valves bodies up to 8”bore size where stocks are kept of standard length products 90% machined withflange detail and vent drain to be machined to customer specification,dramatically reducing lead time.

Maximum sizes and classes8” and below 2500lb, 10” and 12” 1500lb, 14” and 16” 600lb.

technical twinsafe valves in accordance with api 6a

combination valves

painting in house

2 23



reliabilitypressure

under

Oliver Twinsafe Valves Ltd’s comprehensive range of piping valves is designed toexceed the demands of today’s international clients. The expertise of our designdepartment together with our modern manufacturing philosophy ensures that we canoffer the utmost flexibility to accommodate a customer’s specific requirements whilstmaintaining short lead times.

F L E X I B I L I T YOliver Twinsafe products are proven in many installations worldwide, often under themost arduous operating conditions. A policy of continuous product development andimprovement helps us to maintain our enviable reputation for reliability.

A process of ‘continuous inspection’ during assembly and test helps to ensure productintegrity.

R E L I A B I L I T Y

CAT OTV REV 9-10


Oliver Twinsafe Limited Parkgate Industrial EstateKnutsford Cheshire WA16 8FB England

T +44 (0)1565 632636 F +44 (0)1565 654308E [email protected] www.valves.co.uk

A S S E S S M E N T0038 Patented Product

• Full Bore therefore no system pressure

drop problems, no hydrate formation

problems, no flow cavitation problems.

• Using proven trunnion ball

technology in a patented package - world

wide patent no. 1322886 and patent no.

2271164.

• Soft seat and metal seat options for high

temperature service, abrasive /erosive

service or chemical plant applications.

• All forged body construction or all cast

body construction.

• Zero leak points on standard length

twinsafe.

• Maintenance Free

1” to 16” Double block & bleeD PiPeline ValVes solutions to a stanDarD asMe b16.10 length


o.v. a4 twinsafe brochure 09 - process and steam€¦ · reliability pressureunder oliver twinsafe...

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